Ammonium Sulfate — China — A-570-049

An AD/CVD measure is a US trade remedy that can apply to imported merchandise covered by an antidumping (AD) or countervailing duty (CVD) order. AD addresses sales from a foreign country at unfairly low prices, while CVD addresses government subsidies benefiting foreign producers or exporters. For an ammonium sulfate measure, coverage depends on the legal product description—not just the product name or tariff classification.

The measure typically affects importers, foreign producers, exporters, and sometimes related parties involved in covered shipments. An importer may owe additional duties beyond ordinary customs duty, and may face special entry, cash-deposit, certification, recordkeeping, and later-duty-assessment requirements. The US Department of Commerce administers the AD/CVD duty calculations and reviews; US Customs and Border Protection (CBP) collects the duties and enforces entry requirements. A customs broker or trade counsel may be needed for difficult coverage or origin questions.

What to check

• Compare the product’s physical characteristics, chemical specifications, packaging, and intended use with the order’s official scope language; do not rely on the product name alone.
• Confirm the product’s tariff classification, country of origin, and manufacturer and exporter identities, then check whether the relevant order covers that combination.
• Review the current official Commerce and CBP instructions for the applicable cash-deposit, entry, certification, and importer-of-record requirements.
• Keep purchase records, product specifications, bills of lading, origin support, and communications needed to substantiate scope and valuation information.
• Request a formal scope ruling or consult qualified customs counsel or a broker when the product is close to the scope, is blended or specially processed, or the origin or producer status is unclear.